Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4PXJ callsign genealogy
Currently held by Tonkin, Robert B
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by K4PXJ's current licensee, walking backwards.
- Tonkin, Robert BFLgranted 2024-01-23cancelled 2024-02-21
Successor callsigns
Callsigns held now by people who previously held K4PXJ.
No current licensee on record previously held this callsign.